Well, we'll find out about this quite soon now: no later than October 13th.
Really, releasing BatB next year would make no sense at all.
It's by far a better idea to release it in 2017 at the same time as the BatB live action movie.
Besides, this way, "Snow White and the 7 Dwarfs" could be the first traditional animation movie to get released on 4K Blu-ray in the late 2016, which could be a good choice to introduce the new wave of Disney Movies on 4k support.
Then again, Disney has made some strange choices in the past. The Jungle Book would have made more sense to be released in the spring of 2016 for the live-action movie. Cinderella really should have been released this year...it would have given them more time to properly restore it considering how they recognized that the Cinderella restoration is botched up.
There can be no comparison. Because, regarding the cases you specified, the periods of time between the release of the live-action movie in theaters and the scheduled release of the 2D original movie concerned by the moratorium on video support were far too long (more than one year) to get synchronized.
Besides "Pinocchio" was released for the last time almost 2 years before "Beauty and the Beast" did, so it is logically the next.
Also, "Beauty and the Beast" already has its Diamond
edition, but "Pinocchio" hasn't.